Telephone instrument.



PATENTED MAR. 24, 1908.

0. E. COLE.

' TELEPHONE INSTRUMENT.

L I D 'PATENTED MAR. 24; 1908.

U. E. COLE. TELEPHONE INSTRUMENT.

UNITED STATES PATENT OFFICE.

(.LIFFORD .ELBRIDGE COLE, OF BIRMINGHAM. ALABAMA ASSIGNOR OF ONE-HALF TO i' ARAH A. WHITE, 0F BIRMINGHAM, ALABAMA.

LE PHDNE INSTRU Specification of Letters Patent.

Patented March 24:, 1908.

Application filed January 10, 1906. Serial No. 295A41.

vide a receiver in which the entire volume of 5 sound will he conveyed to the ear of the per-- son receiving the message, one wherein the volume of sound may he readily controlled, thus obviating the indistinctness resultant upon loud to ring into the transmitter, and one wherein the controlling or cut-oil valve may be conveniently manipulated.

cot of the invention is to pro- A. further oh vide a transmitting insiroment into which the full volume of the voice of the sender Will be concentrated, thus permitting theadoption of a low tone of voice in using the instrument, and at the same time obviating the confusion of other sounds Within the trans nutter, and one wherein the transmitter may. he closed at will Without cutting off eoinn'n nication u..;h the other end of the line.

with these and other oh ects in view, the invention comprises the novel features of construction and. combination of parts more fully l einofter do Jrii in the roonipan (il'tvv'il'l lfSP-"i is a sid ation rtly in section of a rrvcntion. l? (T 4 a section taken on the line 2 l or .i n. 1%. Fig. 5 is an elevation "(iv partly in section of transmitting instruinept oinl'iodying the invention. Fig. 6 is a top plan view of the some. Fig. 7 is a front end elevation of the instrument.

Referring to the drawings 1 designates a telephone receiver provided as usual with a head 2 having a conical or hell mouth 3 arid a flexible transmitting diaphragm t, these parts, except as hereinafter ox flained being of the usual construction and material and adapted to perform their ordinary functions.

Formed in the head 2, the mouth 3 of which is of suliicicnt size to Wholly cover the ear of the operator, is a transversely extending guide opening or slot 5 situated. in advanre of the diaphragm i and designed to receive a cut-oil valve or slide 5, the stem 7 of which projecns outward through a hearing opening in the head. and terminates at its outer end in a head or push button 8 between which and the adjacent well oi the receiver there is disposed. a compressible spring 9 arjhipted tor maintaining the slide in normal position vh the receiver Wholly ator, thus excluding outside noises and perinittingthe message to he clearly distinguished, whereby the telephone may he used in public places Without the necessity of providing a cahinet therefor. Should the party using the transmitter at the other end i of the line raise his voice h .yond the proper oitch' the slide (i may he adjusted for regulating the volume of sound produced in the receiver, thereby obviating the indistinetness usually attendant talkiiig into the 111831511 tter. in things. 3 and i the device disclosed is identical in construction and operation with that above described except that the valve Y 6 is pivoted at it) to ewir oss the opening in advanee of the die z in i and has its stem 7 provided with 1 curved segmental arm 11 terminating at i outer end in a head i2, there being; to osed upon said arm a normally expanded spr ..3 hour at one against the head and at its other end against o projection or abutment i l on the head o the receiver and serving to maintain the verve mirmaliy in open con" dition.

In Figs. to "5 th is illustrated a transrnitting instrument having an enlarged conical or'hell mouth 16 designed to Wholly cover the mouth oi the operator and provided with a flexible diapl'iragrn 17, this instrument being, With the exception of the size of the mouth 16, of usual construction and adapted to perform its ordinar fund: tions. Formed at the inner end of t 1e head 16 is a guide opening or slot 18 disposed in advance of the diaphragm 17 and adapted. to receive a cut-oil valve or slide 19,-the' stem 20 of which carries a normally ex-- anded spring 21 arranged to hear at its inner end against the adiacent Wall of the head and at its outer end against a push button or head provided on the stem the device is in use the mouth of the receiver entirely covers the ear of the oper upon unduly loud l3 arranged to.

In the use of the instrument the bell 16 wholly covers the mouth of the operator, whereby the instrument will be closed against the elffects of external noises, thus permitting the adoption of a low tone of voice in sending the message and preventing the latter being heard by parties standing near the instrument. When it is desired to conduct a conversation with some one near the transmitter and Without cutting off communication with the other end of the line, the slide 19 may be moved to closed position to prevent such conversation being heard by the party to Whom the message is being sent.

From the foregoing it is apparent that I produce a simple device admirably adapted for the attainment of the ends inview, it

being understood that in attaining these gaging the slot or aperture and ca able of be ing moved bodily into the path 0 the mouth of the instrument, said slide being provided With a stem projecting exteriorly of the body of the instrument and having a push button or head, and a spring coiled on the stem adj acent to the push button and engaging the latter to move the slide in one direction.

In testimony whereof, I a'HiX my signature in presence of two Witnesses.

CLIFFORD ELBRIDGE COLE.

Witnesses:

J. M. MIDDLEBRooKs, C, T. EVANS. 

